/*
 * Copyright (C) 2007-2010 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

package org.geometerplus.fbreader.formats.fb2;

import org.geometerplus.fbreader.library.Tag;
import org.geometerplus.zlibrary.core.xml.ZLStringMap;
import org.geometerplus.zlibrary.core.xml.ZLXMLReaderAdapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;

abstract class FB2TagManager {
    private static final HashMap<String, ArrayList<Tag>> ourMap = new HashMap<String, ArrayList<Tag>>();

    static ArrayList<Tag> humanReadableTags(String id) {
/*		if (ourMap.isEmpty()) {
			new FB2TagInfoReader().read(
				ZLResourceFile.createResourceFile("data/formats/fb2/fb2genres.xml")
			);
		}*/
        return ourMap.get(id);
    }

    private FB2TagManager() {
    }

    private static class FB2TagInfoReader extends ZLXMLReaderAdapter {
        private final String myLanguage;
        private Tag myCategoryTag;
        private Tag mySubCategoryTag;
        private final ArrayList<String> myGenreIds = new ArrayList<String>();

        FB2TagInfoReader() {
            final String language = Locale.getDefault().getLanguage();
            myLanguage = ("ru".equals(language)) ? "ru" : "en";
        }

        public boolean startElementHandler(String tag, ZLStringMap attributes) {
            if ((tag == "subgenre") || (tag == "genre-alt")) {
                final String id = attributes.getValue("value");
                if (id != null) {
                    myGenreIds.add(id);
                }
            } else if (tag == "root-descr") {
                if (myLanguage == attributes.getValue("lang")) {
                    myCategoryTag = Tag.getTag(null, attributes.getValue("genre-title"));
                }
            } else if (tag == "genre-descr") {
                if (myLanguage == attributes.getValue("lang")) {
                    mySubCategoryTag = Tag.getTag(myCategoryTag, attributes.getValue("title"));
                }
            }
            return false;
        }

        public boolean endElementHandler(String tag) {
            if (tag == "genre") {
                myCategoryTag = null;
                mySubCategoryTag = null;
                myGenreIds.clear();
            } else if (tag == "subgenre") {
                if (mySubCategoryTag != null) {
                    for (String id : myGenreIds) {
                        ArrayList<Tag> list = ourMap.get(id);
                        if (list == null) {
                            list = new ArrayList<Tag>();
                            ourMap.put(id, list);
                        }
                        list.add(mySubCategoryTag);
                    }
                }
                mySubCategoryTag = null;
                myGenreIds.clear();
            }
            return false;
        }
    }
}
